If you're not satisfied with the "official" devices (e.g. Jolla 1, Intex Aquafish, or Jolla C [if you were lucky enough]), then there are a number of community ports at varying levels of maturity[1].

Otherwise, there's the possibility that the Fairphone 2 will receive official SailfishOS support. Finally, there's a number of yet unreleased devices with official SailfishOS support[2]

[1] https://wiki.merproject.org/wiki/Adaptations/libhybris

[2] https://together.jolla.com/question/136143/wiki-available-de...